These weathered sentinels form a row just over four metres long, oriented at 54° to 234°, and display a distinctive graduated pattern; the southwestern stone rises 1.2 metres above the current ground level, whilst its middle companion stands at 83 centimetres, and the northeastern stone barely breaks 15 centimetres above the surface. Archaeological investigation has revealed that the smallest stone extends considerably deeper, reaching 45 centimetres in height when measured from the bottom of an excavation pit dug around its base.

This stone row represents one of many prehistoric monuments scattered across the Donegal landscape, likely erected during the Bronze Age when such alignments were commonly constructed throughout Ireland and Britain. The careful positioning and graduated heights suggest intentional design rather than random placement, though the exact purpose remains open to interpretation; these stones may have served astronomical, ceremonial, or territorial functions for the communities who erected them thousands of years ago.

The site was formally documented in the Archaeological Survey of County Donegal, compiled by Brian Lacey and his team in 1983, which catalogued field antiquities spanning from the Mesolithic period through to the 17th century. The survey provides crucial baseline data for understanding and preserving these ancient monuments, ensuring that features like the An Bearnas Íochtarach stone row remain part of Ireland’s archaeological record even as the landscape around them continues to change.